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2021-01-18semihosting: Implement SYS_ISERRORKeith Packard1-0/+4
Part of Semihosting for AArch32 and AArch64 Release 2.0 Signed-off-by: Keith Packard <keithp@keithp.com> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20210107170717.2098982-10-keithp@keithp.com> Message-Id: <20210108224256.2321-21-alex.bennee@linaro.org>
2021-01-18semihosting: Implement SYS_TMPNAMKeith Packard1-2/+19
Part of Semihosting for AArch32 and AArch64 Release 2.0 Signed-off-by: Keith Packard <keithp@keithp.com> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20210107170717.2098982-9-keithp@keithp.com> Message-Id: <20210108224256.2321-20-alex.bennee@linaro.org>
2021-01-18semihosting: Implement SYS_ELAPSED and SYS_TICKFREQKeith Packard1-0/+16
These are part of Semihosting for AArch32 and AArch64 Release 2.0 Signed-off-by: Keith Packard <keithp@keithp.com> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20210107170717.2098982-8-keithp@keithp.com> Message-Id: <20210108224256.2321-19-alex.bennee@linaro.org>
2021-01-18riscv: Add semihosting supportKeith Packard2-2/+85
Adapt the arm semihosting support code for RISCV. This implementation is based on the standard for RISC-V semihosting version 0.2 as documented in https://github.com/riscv/riscv-semihosting-spec/releases/tag/0.2 Signed-off-by: Keith Packard <keithp@keithp.com> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Message-Id: <20210107170717.2098982-6-keithp@keithp.com> Message-Id: <20210108224256.2321-17-alex.bennee@linaro.org>
2021-01-18semihosting: Support SYS_HEAPINFO when env->boot_info is not setKeith Packard1-1/+42
env->boot_info is only set in some ARM startup paths, so we cannot rely on it to support the SYS_HEAPINFO semihosting function. When not available, fallback to finding a RAM memory region containing the current stack and use the base of that. Signed-off-by: Keith Packard <keithp@keithp.com> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20210107170717.2098982-5-keithp@keithp.com> Message-Id: <20210108224256.2321-16-alex.bennee@linaro.org>
2021-01-18semihosting: Change internal common-semi interfaces to use CPUState *Keith Packard1-163/+186
This makes all of the internal interfaces architecture-independent and renames the internal functions to use the 'common_semi' prefix instead of 'arm' or 'arm_semi'. To do this, some new architecture-specific internal helper functions were created: static inline target_ulong common_semi_arg(CPUState *cs, int argno) Returns the argno'th semihosting argument, where argno can be either 0 or 1. static inline void common_semi_set_ret(CPUState *cs, target_ulong ret) Sets the semihosting return value. static inline bool common_semi_sys_exit_extended(CPUState *cs, int nr) This detects whether the specified semihosting call, which is either TARGET_SYS_EXIT or TARGET_SYS_EXIT_EXTENDED should be executed using the TARGET_SYS_EXIT_EXTENDED semantics. static inline target_ulong common_semi_rambase(CPUState *cs) Returns the base of RAM region used for heap and stack. This is used to construct plausible values for the SYS_HEAPINFO call. In addition, several existing functions have been changed to flag areas of code which are architecture specific: static target_ulong common_semi_flen_buf(CPUState *cs) Returns the current stack pointer minus 64, which is where a stat structure will be placed on the stack #define GET_ARG(n) This fetches arguments from the semihosting command's argument block. The address of this is available implicitly through the local 'args' variable. This is *mostly* architecture independent, but does depend on the current ABI's notion of the size of a 'long' parameter, which may need run-time checks (as it does on AARCH64) #define SET_ARG(n, val) This mirrors GET_ARG and stores data back into the argument block. Signed-off-by: Keith Packard <keithp@keithp.com> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Message-Id: <20210107170717.2098982-4-keithp@keithp.com> Message-Id: <20210108224256.2321-15-alex.bennee@linaro.org>
2021-01-18semihosting: Change common-semi API to be architecture-independentKeith Packard2-6/+46
The public API is now defined in hw/semihosting/common-semi.h. do_common_semihosting takes CPUState * instead of CPUARMState *. All internal functions have been renamed common_semi_ instead of arm_semi_ or arm_. Aside from the API change, there are no functional changes in this patch. Signed-off-by: Keith Packard <keithp@keithp.com> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Message-Id: <20210107170717.2098982-3-keithp@keithp.com> Message-Id: <20210108224256.2321-14-alex.bennee@linaro.org>
2021-01-18semihosting: Move ARM semihosting code to shared directoriesKeith Packard3-0/+1128
This commit renames two files which provide ARM semihosting support so that they can be shared by other architectures: 1. target/arm/arm-semi.c -> hw/semihosting/common-semi.c 2. linux-user/arm/semihost.c -> linux-user/semihost.c The build system was modified use a new config variable, CONFIG_ARM_COMPATIBLE_SEMIHOSTING, which has been added to the ARM softmmu and linux-user default configs. The contents of the source files has not been changed in this patch. Signed-off-by: Keith Packard <keithp@keithp.com> [AJB: rename arm-compat-semi, select SEMIHOSTING] Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20210107170717.2098982-2-keithp@keithp.com> Message-Id: <20210108224256.2321-13-alex.bennee@linaro.org>
2020-08-21meson: convert hw/semihostingPaolo Bonzini2-2/+4
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-07-27semihosting: don't send the trailing '\0'KONRAD Frederic1-1/+3
Don't send the trailing 0 from the string. Signed-off-by: KONRAD Frederic <frederic.konrad@adacore.com> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <1592215252-26742-2-git-send-email-frederic.konrad@adacore.com> Message-Id: <20200724064509.331-4-alex.bennee@linaro.org>
2020-06-10semihosting: remove the pthread include which seems unusedKONRAD Frederic1-1/+0
This have been introduced by: 8de702cb677c8381fb702cae252d6b69aa4c653b It doesn't seem to be used so remove it. Signed-off-by: KONRAD Frederic <frederic.konrad@adacore.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Acked-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <1589806958-23511-1-git-send-email-frederic.konrad@adacore.com> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2020-01-09semihosting: add qemu_semihosting_console_inc for SYS_READCKeith Packard1-0/+79
Provides a blocking call to read a character from the console using semihosting.chardev, if specified. This takes some careful command line options to use stdio successfully as the serial ports, monitor and semihost all want to use stdio. Here's a sample set of command line options which share stdio between semihost, monitor and serial ports: qemu \ -chardev stdio,mux=on,id=stdio0 \ -serial chardev:stdio0 \ -semihosting-config enable=on,chardev=stdio0 \ -mon chardev=stdio0,mode=readline This creates a chardev hooked to stdio and then connects all of the subsystems to it. A shorter mechanism would be good to hear about. Signed-off-by: Keith Packard <keithp@keithp.com> Message-Id: <20191104204230.12249-1-keithp@keithp.com> [AJB: fixed up deadlock, minor commit title reword] Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Cc: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Keith Packard <keithp@keithp.com> Tested-by: Keith Packard <keithp@keithp.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
2019-08-16Clean up inclusion of sysemu/sysemu.hMarkus Armbruster1-0/+1
In my "build everything" tree, changing sysemu/sysemu.h triggers a recompile of some 5400 out of 6600 objects (not counting tests and objects that don't depend on qemu/osdep.h). Almost a third of its inclusions are actually superfluous. Delete them. Downgrade two more to qapi/qapi-types-run-state.h, and move one from char/serial.h to char/serial.c. hw/semihosting/config.c, monitor/monitor.c, qdev-monitor.c, and stubs/semihost.c define variables declared in sysemu/sysemu.h without including it. The compiler is cool with that, but include it anyway. This doesn't reduce actual use much, as it's still included into widely included headers. The next commit will tackle that. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Message-Id: <20190812052359.30071-27-armbru@redhat.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
2019-06-12semihosting: split console_out into string and char versionsAlex Bennée1-9/+25
This is ostensibly to avoid the weirdness of len looking like it might come from a guest and sometimes being used. While we are at it fix up the error checking for the arm-linux-user implementation of the API which got flagged up by Coverity (CID 1401700). Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
2019-06-10cpu: Replace ENV_GET_CPU with env_cpuRichard Henderson1-1/+1
Now that we have both ArchCPU and CPUArchState, we can define this generically instead of via macro in each target's cpu.h. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Acked-by: Alistair Francis <alistair.francis@wdc.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2019-05-28semihosting: enable chardev backed output for consoleAlex Bennée2-1/+34
It will be useful for a number of use-cases to be able to re-direct output to a file like we do with serial output. This does the wiring to allow us to treat then semihosting console like just another character output device. Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
2019-05-28semihosting: implement a semihosting consoleAlex Bennée2-0/+78
This provides two functions for handling console output that handle the common backend behaviour for semihosting. Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
2019-05-28semihosting: introduce CONFIG_SEMIHOSTINGAlex Bennée2-1/+4
There isn't much point building semihosting for platforms that don't support it. Introduce a new symbol and enable it only for the softmmu targets that need it. Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
2019-05-28semihosting: move semihosting configuration into its own directoryAlex Bennée2-0/+161
In preparation for having some more common semihosting code let's excise the current config magic from vl.c into its own file. We shall later add more conditionals to the build configurations so we can avoid building this if we don't need it. Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
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